GB1203508A - A process for the purification of benzene-containing hydrogen cyanide - Google Patents
A process for the purification of benzene-containing hydrogen cyanideInfo
- Publication number
- GB1203508A GB1203508A GB46492/68A GB4649268A GB1203508A GB 1203508 A GB1203508 A GB 1203508A GB 46492/68 A GB46492/68 A GB 46492/68A GB 4649268 A GB4649268 A GB 4649268A GB 1203508 A GB1203508 A GB 1203508A
- Authority
- GB
- United Kingdom
- Prior art keywords
- benzene
- hcn
- purification
- oct
- hydrogen cyanide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/02—Preparation, separation or purification of hydrogen cyanide
- C01C3/0295—Purification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1,203,508. Purifying HCN. DEUTSCHE GOLD - UND SILBER - SCHEIDEANSTALT. 1 Oct., 1968 [3 Oct., 1967; 23 Feb., 1968], No. 46492/68. Heading C1A. Hydrogen cyanide is purified of benzene by washing at 20-50‹ C. with one or more highboiling hydrocarbons whose vapour pressure is at most 1.0 Torr at the working temperature, after which HCN is removed from the liquid by heating to 60-200‹ C., and benzene removed from the liquid by blowing off at 60- 250‹ C. Preferably the benzene absorption is carried out at room temperature. The hydrocarbon is preferably an alkylated benzene, e.g. decyl benzene, isodecyl benzene, undecyl benzene or dodecyl benzene, or hexa- or octadecane or mixtures thereof, or mineral oil fractions boiling above 150‹ C. The blowing out may be carried out using steam, N 2 or CO 2 , or a stream of already-purified HCN may be used. The HCN may be returned for re-purification to the absorption column after benzene has been absorbed in a quantity of 85-95% of the original amount. Preferably in the washing stage 1 m.<SP>3</SP> of solvent is used per 100 kg. of solvent.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP1271A DE1271091B (en) | 1967-10-03 | 1967-10-03 | Process for the purification of benzene-containing hydrogen cyanide |
| DE1667784 | 1968-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1203508A true GB1203508A (en) | 1970-08-26 |
Family
ID=25751368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB46492/68A Expired GB1203508A (en) | 1967-10-03 | 1968-10-01 | A process for the purification of benzene-containing hydrogen cyanide |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3488919A (en) |
| JP (1) | JPS5022518B1 (en) |
| AT (1) | AT282654B (en) |
| CH (1) | CH522564A (en) |
| FR (1) | FR1583045A (en) |
| GB (1) | GB1203508A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2931353C2 (en) * | 1979-08-02 | 1982-06-09 | Degussa Ag, 6000 Frankfurt | Process for the purification of raw, hydrous cyanogen chloride |
| JP2018521946A (en) * | 2015-07-14 | 2018-08-09 | ザ ケマーズ カンパニー エフシー リミテッド ライアビリティ カンパニー | Method for removing nitriles from hydrogen cyanide |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE953791C (en) * | 1951-03-16 | 1956-12-06 | Degussa | Process for the separation of hydrogen cyanide and ammonia from gas mixtures |
-
1968
- 1968-08-29 CH CH1296268A patent/CH522564A/en not_active IP Right Cessation
- 1968-09-23 US US761633A patent/US3488919A/en not_active Expired - Lifetime
- 1968-10-01 GB GB46492/68A patent/GB1203508A/en not_active Expired
- 1968-10-02 FR FR1583045D patent/FR1583045A/fr not_active Expired
- 1968-10-03 AT AT965868A patent/AT282654B/en not_active IP Right Cessation
- 1968-10-03 JP JP43072150A patent/JPS5022518B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR1583045A (en) | 1969-10-10 |
| US3488919A (en) | 1970-01-13 |
| AT282654B (en) | 1970-07-10 |
| CH522564A (en) | 1972-06-30 |
| JPS5022518B1 (en) | 1975-07-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |